document.write( "Question 360912: how many grams of alcohol must be added to 40 grams of a 15% alcohol solution to obtain a 20% alcohol solution \n" ); document.write( "

Algebra.Com's Answer #257517 by Fombitz(32388) $\"\"$ $\"About$

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Let A be the number of grams of 100% alcohol.
\n" ); document.write( " $\"100A%2B15%2840%29=20%28A%2B40%29\"$
\n" ); document.write( " $\"100A%2B600=20A%2B800\"$
\n" ); document.write( " $\"80A=200\"$
\n" ); document.write( " $\"A=200%2F80\"$
\n" ); document.write( " $\"highlight%28A=5%2F2%29\"$ grams
\n" ); document.write( " \n" ); document.write( "

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